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What does sound deadening do for car audio?

I know that sound-deadening can make the inside of your car much quieter—but does that mean it also improves how my speakers sound? How does that work, and what does sound deadening do for car audio?

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Kathryn Mae Kurlychek · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
To improve and enhance the overall sound of your car’s audio sound deadening materials can help with more than extra noise cancellation.
That’s because sound-deadening materials generally add mass to side panels, wheel wells, and other components of your car that typically make noise when you drive. Of course, the type of sound-deadening material you’re using will make a difference in just how much louder or clearer your car audio sounds. If you’re looking for a foolproof way to improve your stereo’s sound, the best car audio sound-deadening material is going to be a sound-deadening mat.
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